In a network with multiple voltage sources, the current in any
branch is the sum of the currents which would flow in that branch due to each voltage source
acting alone with all other voltage sources replaced by their internal impedances.

The goal of folowing text is to check superposition theorem.

Step 1. Construct following circuit using Circuit Magic then run Node Voltage Analysis.
(popular circuits analysis technique). You can alsocalculate currents using other
techniques